#!/usr/bin/env bash

# ============================================
# Detection
# ============================================

function platform::detect() {
  case "$(uname -s)" in
    Linux*)   PLATFORM="linux" ;;
    Darwin*)  PLATFORM="macos" ;;
    CYGWIN*|MINGW*|MSYS*) PLATFORM="windows" ;;
    *)        PLATFORM="unknown" ;;
  esac

  platform::_apply_platform_guards
}

function platform::is_macos()   { [[ "$PLATFORM" == "macos" ]]; }
function platform::is_linux()   { [[ "$PLATFORM" == "linux" ]]; }
function platform::is_windows() { [[ "$PLATFORM" == "windows" ]]; }

# ============================================

function platform::_apply_platform_guards() {
  if platform::is_windows; then
    export MSYS_NO_PATHCONV=1
    export MSYS2_ARG_CONV_EXCL="*"
  fi
}

# ============================================

function platform::elevation_fail() {
  if platform::is_windows; then
    echo "Action must be run as Administrator"
  else
    echo "Action must be run with sudo or as root"
  fi
}

function platform::hosts_file() {
  local hostsPath='/etc/hosts'

  if platform::is_windows; then
    hostsPath='/c/Windows/System32/drivers/etc/hosts'
  fi

  echo $hostsPath
}

function platform::sudo() {
  if platform::is_windows; then
    "$@"
  else
    [[ $EUID -ne 0 ]] && sudo "$1" "$@"
  fi
}

function platform::require_privileges() {
  if platform::is_windows; then
    if ! net session >/dev/null 2>&1; then
      return 1
    fi
  else
    platform::sudo -n true 2>/dev/null || platform::sudo true || return 1
  fi
}

# ============================================
# Docker
# ============================================

function platform::docker_path() {
  local path="$1"

  if platform::is_windows; then
    cygpath -m "$path"
  else
    echo "$path"
  fi
}

# ============================================
# Platform functions
# ============================================

# Detect GNU realpath (supports --relative-to)
function platform::has_gnu_realpath() {
  realpath --help 2>&1 | grep -q -- '--relative-to'
}

# Detect grealpath (Homebrew GNU coreutils)
function platform::has_grealpath() {
  command -v grealpath >/dev/null 2>&1
}

# Detect python3
function platform::has_python() {
 command -v python3 >/dev/null 2>&1
}